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英口坂达行吊的合义与构成伟1.含义:表示现在正在进行或一4段时间正在进行的动作标志词:n0W，look,listen等。(2.构成:be+V-ingHeisreadingabook.卵a木主宏飞3.V-ing变化规则:山一般加ing.如:play-playingWatch-watching)以不发音的e结尾,去e加ing.如:take-takingcolne-coming刃元+辅结尾,且是重读闭音节的单词,双写辅音字母+ing.如:run-runningswim-sSwimming练习1.写出下列动的ing形式.1.Help_e_“_coming3.sWim_sWimming4aeabat5ditae日口5678.giye_“giVing.find“finding“.Sit_“_sitting.Write_writing.Whatishedoing2HeisplayingbasketbalL.Whatistheboydoing?Heissinging.-TISsthewomanwriting2-NoO,sheisn“t.Sheisreadingabook.-Whataretheydoing?-Theyareswimming.-AretheysSWimming?2-Ves,theyare.-No,theyaren“t.Theyaren“tsingTheyaredancin
